I believe that some people are seeing something. I don't believe it's all a hoax. Of course some is faked but that doesn't mean all is.
Each of us has life experiences that shape what we can believe or not believe. My life work has put me in situations that exposed me to supernatural manifestations that like bigfoot, have no basis of proof. I mean you can't really see Gods footprint in the conventional way. I believe Gods footprint can be seen in changed lives, and Maciles that defy the laws of nature.
In my experience there have been times that God opened my eyes to see into the spiritual realm around us. Usually he was showing me something to warn me or help me understand how to deal with a situation. But other times the powers of darkness have come to do spiritual warfare. Let me say that the name of Jesus and his shed blood is our covering in these cases. We have authority over the powers of darkness in the name of Jesus.
If bigfoot is a demonic manifestation, as I suspect, that would explain the lack of physical evidence. It would also mean our carnal weapons, guns, are useless against him.
As time grows short for the church age and we fast approach the return of our lord Jesus Christ, these type of manifestations will continue to reveal themselves bringing fear & confusion into the world.